Time-controlled mechanism.



AUGUST' C. STREITWGLF, `0F NEW BRUNSWICK, NEW JERSEY.

TIME-CONTROLLED MECHANIJSM.

specification of Letters meat.

Patented J illy- 1 1913.

Application filed anuary 30, 1913. Serial No. 745,131.

To all whom it may concern.' l

. 3e it known that I, AUGUST C. STR'IT'- wow, a citizen of-.the`United States, residing at New Brunswick, county of 'Middlesex, and State of New Jersey, have invented certain new and useful Improvements in Timei' .Controlled Mechanism, of which the following is a full', clear, and exact description.

My invention relates to a time controlled mechanism for operating various devices.

In the present embodiment I show my improved mcchanismapplied to a furnace damper, but it is to be understood that it is applicable to many other purposes such as providing the. means for closing an electric circuit at a certain time.

My invention relates to a mechanism -which can be attached to the alarm winding key of an ordinary alarln clockwithout any I substantial alterations in the structnre voit' the clock. 1

One of the difliculties of previous devices of this sort is that a great amount of,A strain has been transmitted to the alarm key arbor. In alarm clocks the supports for this arbor are made quite li ht and a slight strain will cause such'a de ection of the arbor inside gears.

the clock that the escapement will' bind and the whole' device will be rendered inoperative.

To the elimination of these defects and to other ends my invention consists in the form and construction shown in the Aappended drawings and more particularly pointed out in the appended claims.

In the drawings Figure 1 shows a rear View ot' the device with the'alarm clock attached. Fig. '2 shows a top view ofthe drums and eoiperating gears. Fig. 3 shows an unbalanced couple which would result if a single drum were used.

In Fig. l, 10 the alarm clock case. 11 is the alarm arbor, with winding key at.- tached. l2 is a plate. which is adapted to be placed over the rear of the clock to'support inv device. The device consists essentially -of the gears 123 and 14. mounted upon opposite sides or' a drum l5. This drum and the attached gears are fastened to the alarm key arbor in any suitable manner, either by keys or by pinioning the shaft io the drum and A sei-ond pair of gears \1 G, and 17 incshed with the aforesaid gears lil yand 14 and 'carri' between them a drum 18.v These :gears ld and li' and the drum 18 are'rotatably mounted upon the shaft 19j The shaft 19 is fixed in the plate 12. Wound' around the drum 18 1s a wire or' cord 20 which has an end extending away from the drum 18 in a horizontal direction. 21 is a pulley over which the wire so passes. A weight 29. .is placed on the end of the .wire or cord 20. A second wire entirely separatel from the rst wire 2O is fastened toand wound around the drum `15.- One end extends from this drum horizontally over the pulley 22' thence to the dampers or other mechanism to be operated. Fig. 1 shows the ,cord as attached tod'ampersvThe double gears 13 and 14 Vand 16 and 17 are so located that a line passing through 'their axes 'makes an angle of substantially 45, with the horizontal. This-angle has beendetermined b experiment to be the inost. suitable angle to' .eliminate the strain upon the shaft.' If av -single drum were usedthe strain resulting from the two .cords pulling in opposite directions upon the drum would tend to rotate the drum about a vertical axis. This is due to the fact that the thickness of the 'cord makes the pull on one side at a point farther out from the point 'of support than the pull from the other cord. This produces an` un-v balanced couple upon-the drum (if the forces' on both 'cords areconsidered e'qual) which tends to rotate the` drum about a vertical axis. This tendency of the drum to rotate causes the alarm key arbor to bind and so causes the device to become inoperative.

Fig. 8 will show'the unbalanced couple which would result if asingle drum were used. liy using the double drum and double gear construction this rotation of the drum on the alarm Ikey arbor shaft is done away with; The strain is transmitted through the gears to the other shaft, 19,-and deflection of the arbor shaft is prevented.

I claimtl. In a time `controlled mechanism in combination, an arbor operable upon. the release of-an escapement, a drum fastened to said the device to'be operated, a second flexible' member attached at one end to the other drum -having its other end fastened to a weight.

2. In a time controlled mechanism,in combination, a time controlled arbor, a drum thereon, a pair of gears on said drum, a seoond drum, a pair of gears thereon, said gears meshing with the aforesaid gearsfand means to connect one drum With the device to be operated, and gravity means associated with the other drinn to balance the load.

In testimony whereof I affix my signature in the presence of two subscribing witnesses.

AUGUST C. STREITWOLE Witnesses:

M. LAWSON DYER, VM. BoHLnER. 

